Symplectic Hamiltonian finite element methods for linear elastodynamics
Symplectic Hamiltonian finite element methods for linear elastodynamics
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线性弹性动力学的辛哈密顿有限元方法
DOI:
10.1016/j.cma.2021.113843
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发表时间:
2021
影响因子:
7.2
通讯作者:
Peraire, Jaime
中科院分区:
文献类型:
--
作者:
Sánchez, Manuel A.;Cockburn, Bernardo;Nguyen, Ngoc-Cuong;Peraire, Jaime
We present a class of high-order finite element methods that can conserve the linear and angular momenta as well as the energy for the equations of linear elastodynamics. These methods are devised by exploiting and preserving the Hamiltonian structure of the equations of linear elastodynamics. We show that several mixed finite element, discontinuous Galerkin, and hybridizable discontinuous Galerkin (HDG) methods belong to this class. We discretize the semidiscrete Hamiltonian system in time by using a symplectic integrator in order to ensure the symplectic properties of the resulting methods, which are called symplectic Hamiltonian finite element methods. For a particular semidiscrete HDG method, we obtain optimal error estimates and present, for the symplectic Hamiltonian HDG method, numerical experiments that confirm its optimal orders of convergence for all variables as well as its conservation properties.
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DOI:
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DOI:
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影响因子:
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